.music-player * {
    box-sizing: border-box;
}

.music-player h1, 
.music-player h2, 
.music-player h3,
.music-player h4, 
.music-player h5, 
.music-player h6, 
.music-player p, 
.music-player ul, 
.music-player li {
    margin: 0; padding: 0;
}

.music-player li { list-style: none; }